class User {
String name
int age
}
def users = [
new User(name: "Bob", age: 20),
new User(name: "Tom", age: 50),
new User(name: "Bill", age: 45)
]
// sort by age
users.sort { a, b -> a.age <=> b.age }
If you don't have permissions to install perl modules, you may still install them manually, indicating a custom path where you've got writing permissions.
Fist, download and unzip module archive:
wget module.tar.gz
tar -xzf module.tar.gz
cd module
Then, if the module distribution contains a M...
All values in Rust have exactly one owner. The owner is responsible for dropping that value when it goes out of scope, and is the only one who may move the ownership of the value. The owner of a value may give away references to it by letting other pieces of code borrow that value. At any given time...
All values in Rust have a lifetime. A value's lifetime spans the segment of code from the value is introduced to where it is moved, or the end of the containing scope
{
let x = String::from("hello"); // +
// ... :
let y = S...
Most of the questions around ownership come up when writing functions. When you specify the types of a function's arguments, you may choose how that value is passed in. If you only need read-only access, you can take an immutable reference:
fn foo(x: &String) {
// foo is only authorized to...
Some Rust types implement the Copy trait. Types that are Copy can be moved without owning the value in question. This is because the contents of the value can simply be copied byte-for-byte in memory to produce a new, identical value. Most primitives in Rust (bool, usize, f64, etc.) are Copy.
let x...
After Successfully installing Xamarin Studio on OS X.
It's time for the first Hello World Application.
Hello World Application: Xamarin.Forms
What is Xamarin Forms :
Xamarin.Forms is a new library that enables you to build native UIs for iOS, Android and Windows Phone from a single, shared C# c...
def honestlyNoParam = { ->
"I Don't have it"
}
// The following all throw IllegalArgumentException
honestlyNoParam.curry('whatever')
honestlyNoParam.rcurry('whatever')
honestlyNoParam.ncurry(0, 'whatever')
This example shows how to establish a connection to an SSL-enabled POP3 email server and send a simple (text only) email.
// Configure mail provider
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.mymailprovider.com");
props.put("ma...
Because generating documentation is based on markdown, you have to do 2 things :
1/ Write your doctest and make your doctest examples clear to improve readability (It is better to give a headline, like "examples" or "tests"). When you write your tests, do not forget to give 4 s...
How to get the summation of amount? See the below aggregate query.
> db.transactions.aggregate(
[
{
$group : {
_id : '$cr_dr',
count : {$sum : 1}, //counts the number
totalAmount : {$sum : '$amount'} //sum...
Specifies how the database generates values for the property. There are three possible values:
None specifies that the values are not generated by the database.
Identity specifies that the column is an identity column, which is typically used for integer primary keys.
Computed specifies that th...
To find active ScriptableObjects during runtime, you can use Resources.FindObjectsOfTypeAll().
T[] instances = Resources.FindObjectsOfTypeAll<T>();
Where T is the type of the ScriptableObject instance you're searching. Active means it has been loaded in memory in some form before.
This me...
A shallow copy is a copy of a collection without performing a copy of its elements.
>>> import copy
>>> c = [[1,2]]
>>> d = copy.copy(c)
>>> c is d
False
>>> c[0] is d[0]
True
You can create shallow copies of lists using slices.
>>> l1 = [1,2,3]
>>> l2 = l1[:] # Perform the shallow copy.
>>> l2
[1,2,3]
>>> l1 is l2
False
Sets also have a copymethod. You can use this method to perform a shallow copy.
>>> s1 = {()}
>>> s2 = s1.copy()
>>> s1 is s2
False
>>> s2.add(3)
>>> s1
{[]}
>>> s2
{3,[]}
In functional programming languages like F# null values are considered
potentially harmful and poor style (non-idiomatic).
Consider this C# code:
string x = SomeFunction ();
int l = x.Length;
x.Length will throw if x is null let's add protection:
string x = SomeFunction ();
int l = x ...
